Got bargain on QX9770 socket 775 CPU, had a big case on hand.
Bought Asus Maximus Extreme so play with overclocking
Assembled with plenty big power supply, water cooling, crossfire graphics
I made an assumption that 2 kits of Gskill Ripjaw X F3-128000CL9D-4GBXL would be very similar with todays manufacturing techniques and if I bought at the same time I would get sets manufactured at the same time, WRONG.
I put them in without even noticing the differences they memtested fine for 12+ hours. I was experiencing, even at standard timings @ 2T, instability in POST and intermittent hard hangs when working. I found on inspection:
One set green PCB manufactured Feb 2012 (slot 1 in image below)
One set black PCB manufactured Jul 2011 (slot 2 in image below)
I did not think they would be that different to cause the trouble?
What is very surprising to me is that they have different XMP values in the SPD's. Why the difference, 1T and 2T would have to make them incompatable if running XMP and indeed make them different RAM? I thought all SPD values were programmed to the chips in manufacture and would stay the specification for that Part No?
Bought Asus Maximus Extreme so play with overclocking
Assembled with plenty big power supply, water cooling, crossfire graphics
I made an assumption that 2 kits of Gskill Ripjaw X F3-128000CL9D-4GBXL would be very similar with todays manufacturing techniques and if I bought at the same time I would get sets manufactured at the same time, WRONG.
I put them in without even noticing the differences they memtested fine for 12+ hours. I was experiencing, even at standard timings @ 2T, instability in POST and intermittent hard hangs when working. I found on inspection:
One set green PCB manufactured Feb 2012 (slot 1 in image below)
One set black PCB manufactured Jul 2011 (slot 2 in image below)
I did not think they would be that different to cause the trouble?
What is very surprising to me is that they have different XMP values in the SPD's. Why the difference, 1T and 2T would have to make them incompatable if running XMP and indeed make them different RAM? I thought all SPD values were programmed to the chips in manufacture and would stay the specification for that Part No?
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